const
  Frames_Per_Second = 20;
  Display_Seconds   = 5;
var
  proc: TImageEnProc;
  io: TImageEnIO;
  startBitmap, endBitmap : TIEBitmap;
  i, frameCount: Integer;
  transLevel: Single;
begin
  startBitmap := TIEBitmap.Create;
  endBitmap   := TIEBitmap.Create;

  proc := TImageEnProc.Create( nil );
  io   := TImageEnIO.Create( nil );
  try
    if io.CreateAVIFile('D:\Transition.avi', Frames_Per_Second, 'cvid' ) = ieaviNOCOMPRESSOR then
      raise Exception.create( 'This compressor is unavailable!' );

    startBitmap.LoadFromFile( 'D:\image1.jpg' );
    endBitmap.LoadFromFile( 'D:\image2.jpg' );

    // Call PrepareTransitionBitmaps once
    proc.PrepareTransitionBitmaps(startBitmap, endBitmap, SelectedTransitionEffect);

    frameCount := Display_Seconds * Frames_Per_Second;

    for i := 0 to frameCount - 1 do
    begin
      // We want levels from 0% to 100% (show start and end)
      transLevel := 100 / ( frameCount - 1 ) * i;

      // Call CreateTransitionBitmap for each required frame
      proc.CreateTransitionBitmap( transLevel, io.IEBitmap );
      io.SaveToAVI();

      Caption := IntToStr( Round( i / frameCount * 100 )) + '%';
    end;

    io.CloseAVIFile();
    Caption := 'Done!';

  finally
    startBitmap.Free();
    endBitmap.Free();
    proc.Free();
    io.Free();
  end;
end;